در اين پست مي خوام به تشريح و باز كردن اصولي آيپد واي فاي اشاره كنم.
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It's here! We got our hands on Apple's newest toy, the iPad, and we can't wait to see what's in it. So we won't— let's do this!
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Insert a metal spudger between the display and the rear case to pry the iPad open.
What an environmentally friendly device!
Arsenic-free display glass
BFR-free
Mercury-free LCD display
PVC-free
Recyclable aluminum and glass enclosure
Environment WIN!
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Lift the display assembly away from the rear case.
A first peek under the hood reveals two huge Li-ion Polymer batteries taking up most of the space in this device.
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Aaaand it's off. You have no idea how glad we are that this didn't require a heat gun.
Words from the wise: You might break some tabs getting the display assembly off.
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Wow, what gorgeous symmetry.
The display assembly and rear case assembly are each 350g. Talk about 50/50 weight distribution.
The empty void in the upper right corner is where the cellular communications board will go in the 3G iPad.
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The display has a marking referencing Honeywell patent #5280371.
It looks pretty barren, mostly because all the 3G equipment is missing.
The 3.75V, 24.8 watt-hour battery provides the juice for an advertised 10 hours of use. In contrast, the iPhone 3GS has a 4.51 watt-hour battery and the MacBook Air has a 40 watt-hour battery.
The USB power supply had to be enhanced specifically for the iPad. It's a 10W unit manufactured by Foxlink Technology, Ltd., part #A1357 W010A051
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Disconnecting the display data cable.
Removing these connectors is a two step process. You first have to flip up the locking bar (pictured) and can then slide the cable out of the socket.
The display data cable connector is the same style used in all of the new Unibody MacBooks.
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Disconnecting the volume, power, and screen rotation lock buttons connector.
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The main board is secured to the back panel by T4 Torx screws.
We have never seen Apple use screws with a bit this small before.
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Top and bottom of logic board with the EMI shield on.
It looks like this board was made by AT&S. We haven't seen Apple's PCB manufacturers brand their boards before.
The logic board is about 4.5" wide, spanning about 60% of the iPad's width.
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Remove the EMI shield from the logic board, and presto!
This board is markedly different than the pre-production board we uncovered.
Markings on the A4:
N26CGM0T 1007 APL0398 33950084 YNL184A2 1004 K4X2G643GE
Yes, the K4X2 is a Samsung DRAM part number!
Decoding the part number shows there is 2Gb of memory inside. This translates into ~128MB of memory per die, for 256 MB total. (NOT 512MB, as we previously reported.)
This means the A4 processor is probably being manufactured by Samsung.
The DRAM was stamped at the end of January, while the processor die was likely manufactured the third week of February.
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A shot of the logic board minus the steel EMI shield.
The manufacturer of the memory has switched from Toshiba on the FCC teardown to Samsung on this device.
Samsung K9LCG08U1M 8 GB NAND flash.
We love how much easier Samsung's chip numbers are to interpret.
Broadcom BCM5973 I/O controller.
The Apple A4 is marked up much nicer than the part in the FCC photos from yesterday.
Texas Instruments CD3240A1
NXP: L061 01 4 ZSD950
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